ROC Receiver Dynamic Mode Switching for Interference Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Radio on Chip (ROC) receivers have a limited dynamic range, failing to effectively manage static sensitivity and linearity across various blocking scenarios, leading to high noise and power consumption, especially in strong interference conditions.
Innovation Solution
A receiver architecture incorporating an attenuation circuit, low-noise amplification circuit, and orthogonal down-frequency conversion circuit, controlled by a digital control circuit to adjust signal processing based on interference power, allowing for different working modes to optimize noise and linearity performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an LNA with high linearity requirement is added to optimize static sensitivity at weak blocker, then noise performance is improved, but power consumption increases and cost increases
Solution Approach 1:
The patent applies dynamic switching between different working modes (first, second, and third modes) based on the blocking scenario. The receiver dynamically adjusts whether to use the attenuation circuit and/or the LNA depending on the interference signal power level, thereby optimizing power consumption while maintaining static sensitivity performance across different operating conditions.
Solution Approach 2:
The patent changes the working parameters of the receiver by switching between different modes. In the first mode, both attenuation circuit and LNA are used for weak blocker scenarios. In the second mode, only the LNA is used for medium blocker scenarios. In the third mode, neither is used for strong blocker scenarios. This parameter switching resolves the contradiction between static sensitivity and power consumption.
2Measurement precision
If an LNA with high linearity requirement is added to optimize static sensitivity at weak blocker, then noise performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements dynamic mode switching that adapts to different blocking scenarios. By only activating the LNA when needed (weak and medium blocker scenarios) and keeping it inactive for strong blocker scenarios, the system achieves cost-effective manufacturing while maintaining static sensitivity performance where it is most beneficial.
Solution Approach 2:
The receiver changes its operational parameters by switching between three modes. This allows the system to achieve optimal static sensitivity performance without permanently incorporating high-cost high-linearity LNA components, thereby reducing manufacturing cost while maintaining performance where needed.
3Device complexity
If the receiver uses a fixed working mode, then device complexity is reduced, but adaptability to different blocking scenarios deteriorates
Solution Approach 1:
The patent introduces dynamic mode switching capability that allows the receiver to adapt to different blocking scenarios (weak, medium, and strong blockers) by selecting appropriate working modes. The control circuit automatically determines the blocking scenario and switches between modes, achieving high adaptability without significantly increasing device complexity through the use of integrated control logic.
Solution Approach 2:
The receiver is designed with multi-functionality to handle different blocking scenarios using a unified architecture that supports three different working modes. The same receiver hardware can operate in different modes depending on the scenario, achieving universal adaptability without requiring separate dedicated circuits for each scenario.
4Measurement precision
If the receiver increases dynamic range to handle strong blockers, then linearity in strong blocking scenario is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic mode switching that activates different processing paths based on the blocking scenario. For strong blocker scenarios, the receiver switches to the third mode where the attenuation circuit is used to reduce the strong signal level before further processing, thereby improving blocker sensitivity without requiring the entire system to be redesigned for high dynamic range, thus limiting the increase in device complexity.
Solution Approach 2:
The receiver changes its operational parameters by switching between modes. In the third mode specifically designed for strong blockers, the attenuation circuit is activated to handle strong interference signals, improving blocker sensitivity while maintaining manageable device complexity through the modular nature of the switching architecture.
Data Source
Figure 1~2
Figure 3a~3b
Figure 3c~4a
AI summary
Embodiments of the present invention provide a receiver and a wireless communications apparatus. The receiver includes: an attenuation circuit, configured to receive an input signal, and obtain a first signal according to the input signal; a low-noise amplification circuit, configured to receive the first signal, and obtain a second signal according to the first signal; an orthogonal down-frequency conversion circuit, configured to receive the second signal, and process the second signal to obtain an output signal; and a control circuit, configured to separately control the attenuation circuit and the low-noise amplification circuit according to power of an interference signal included in the output signal, so as to determine whether the attenuation circuit attenuates the input signal and whether the low-noise amplification circuit amplifies the first signal.